Glossary

Apex

 

Apex

It's the point at which you've completed half of the direction change you'll be making over the course of an entire turn.  It can be at the same point at which your skis are pointing straight down the falline, as in the drawing above, but it doesn't have to be.  it just depends on your orientation to the falline when the turn starts and ends.  And it doesn't necessarily mean the halfway point as measured by time spent turning, as you can see in the drawing below.  It only refers to the point at which half the turns direction change has been completed, regardless of the shape or placement of that turn on the slope.